I used a sunbed in my 20ties, probably in total maybe 10 times. Now 34, worried about skin cancer. I have quite a lot of skin tags under my breasts.?

Surveillance. Have somebody -- a partner, a physician, or whoever -- keep an eye on your skin and be familiar with the appearances of the common skin cancers. Get the suspicious ones off before they can hurt you. It's as simple as that. Worry accomplishes nothing. Death from skin cancer is basically 100% preventable if you stay alert. The skin tags aren't a factor and aren't sun-related.